// Copyright (c) 2018 Baidu, Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include "matching/lexical/jaccard_sim.h"

namespace anyq {

JaccardSimilarity::JaccardSimilarity(){
}

JaccardSimilarity::~JaccardSimilarity(){
    destroy();
}

int JaccardSimilarity::init(DualDictWrapper* dict, const MatchingConfig& matching_config) {
    return 0;
}

int JaccardSimilarity::destroy() {
    return 0;
}

int JaccardSimilarity::compute_similarity(const AnalysisResult& analysis_res,
        RankResult& candidates) {
    if (analysis_res.analysis.size() < 1) {
        return -1;
    }

    for (size_t i = 0; i < candidates.size(); i++) {
        // 无效候选，跳过
        if (candidates[i].abandoned) {
            continue;
        }
        // 计算query与候选的字符串Jaccard相似度
        float jaccard_sim = jaccard_similarity(analysis_res.analysis[0].query, 
                candidates[i].match_info.text);
        DEBUG_LOG("jaccard = %f", jaccard_sim);
        candidates[i].features.push_back(jaccard_sim);
    }

    return 0;
}

} // namespace anyq
